/**
 *       Copyright (c) 2012 Lukas Zaruba
 *
 *   This file is part of Robot Playground.
 *
 *   Robot Playground is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Robot Playground is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with Robot Playground. If not, see <http://www.gnu.org/licenses/>.
 */
package net.zarubsys.robotplayground.scriptprogram;

import java.util.ArrayList;
import java.util.List;

import net.zarubsys.commons.scripting.IScriptFunction;
import net.zarubsys.commons.scripting.ParsedStatement;
import net.zarubsys.commons.scripting.ScriptingEnvironment;
import net.zarubsys.commons.scripting.ScriptingException;
import net.zarubsys.robotplayground.core.program.API;

/**
 * APIFunction
 *
 * @author Lukas Zaruba, lukas.zaruba@gmail.com
 */
public class APIFunction implements IScriptFunction {
	
	private final String functionName;
	private final API api;

	public APIFunction(API api, String functionName) {
		this.api = api;
		this.functionName = functionName;
	}

	@Override
	public String getName() {
		return functionName;
	}

	@Override
	public int getMinArgsNum() {
		return -1;
	}

	@Override
	public int getMaxArgsNum() {
		return -1;
	}

	@Override
	public Object execute(ScriptingEnvironment env, List<ParsedStatement> args) throws ScriptingException {
		String[] names = functionName.split("\\.");
		if (names.length != 2) {
			throw new ScriptingException("Unparsable function name '" + functionName + "'!", env.getCurrentScriptLocator());
		}
		
		List<Object> values = new ArrayList<>(args.size());
		for (ParsedStatement statement : args) {
			values.add(statement.execute(env));
		}
		return api.callFunction(names[0], names[1], values);
	}

}

